What this dual-port SRAM does in the system
The Infineon CY7C027V-20AC is a 512Kbit asynchronous dual-port SRAM organized 32K x 16. Two independent ports with separate address, data, and control lines allow simultaneous read/write access from two bus masters — a common architecture for shared memory in multiprocessor systems, FIFO emulation, or mailbox registers. The 20 ns access time sets the arbitration window: when both ports hit the same address, the on-chip logic resolves contention without external logic.
A 20 ns access time means the SRAM can complete a read or write cycle in 20 ns, supporting bus clocks up to roughly 50 MHz with zero wait states. For a dual-port part, the access time directly affects the arbitration latency: the busier the shared memory, the tighter the timing budget. This part is sized for moderate-speed embedded systems — think DSP + microcontroller sharing a lookup table or data buffer — not for a 200 MHz cache line.
3V–3.6V supply and commercial temperature range
Not rated for under-hood automotive, outdoor telecom cabinets, or extended-temperature industrial floors.
Infineon (formerly Cypress Semiconductor) lists the CY7C027V-20AC as obsolete. No factory orders or last-time-buy windows remain open. Buyers should confirm date code and condition at quote time; this is a mature part with no active factory support.